The DOI matches its Crossref record; 40 of the 40 references it cites were found in a registry or an index.
Long-Term Cyclability of NCM-811 at High Voltages in Lithium-Ion Batteries: an In-Depth Diagnostic Study
Open accessAbstract
High-nickel layered oxides, such as LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM-811), offer higher energy density than their low-nickel counterparts at a given voltage and are gaining major traction in automotive lithium-ion batteries for electric vehicles. Besides high-Ni content, higher charging voltages above 4.3 V vs Li + /Li boost the energy and represent another focus in battery development. Here, we investigate the long-term cyclability of NCM-811 in graphite pouch cells over 1000 deep cycles between 2.5–4.2, 2.5–4.4, and 2.5–4.5 V through a suite of sensitive characterization techniques. The NCM-811 full cells show severely deteriorated cyclability with higher charging voltages, from 78% at 4.2 V to 52 and 32% at 4.4 and 4.5 V, respectively. At 4.2 V, minor parasitic electrolyte oxidation as well as cathode Li/Ni mixing and cracking are revealed after cycling, while transition-metal dissolution and surface reconstruction into rock-salt NiO are virtually undetectable. At 4.4 and 4.5 V, transition-metal dissolution and crossover to the anode become much more pronounced and a primary contributor to the capacity fade, while significant surface NiO formation causes substantial voltage polarization, which is less noticeable at 4.2 V. Meanwhile, more severe electrolyte oxidation, Li/Ni mixing, and particle pulverization exacerbate the voltage and capacity fade. These results outline distinct challenges for stable high-Ni layered oxide cathodes in high-voltage Li-ion batteries.
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Cites
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Cited by
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Phase Behavior during Electrochemical Cycling of Ni‐Rich Cathode Materials for Li‐Ion Batteries
Xu, C., Reeves, P. J., Jacquet, Q., & Grey, C. P. (2021) · Advanced Energy Materials · doi:10.1002/aenm.202003404 · Cited by 429
Lithium-ion batteries and the future of sustainable energy: A comprehensive review
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IoB: Internet-of-batteries for electric Vehicles–Architectures, opportunities, and challenges
Li, H., Bin Kaleem, M., Liu, Z., Wu, Y., Liu, W., & Huang, Z. (2023) · Green Energy and Intelligent Transportation · doi:10.1016/j.geits.2023.100128 · Cited by 95
Metadata
- Authors
- Li, W., Liu, X., Xie, Q., You, Y., Chi, M., & Manthiram, A.
- Venue
- Chemistry of Materials
- Publisher
- American Chemical Society (ACS)
- Published
- 2020-08-27
- Volume
- 32
- Issue
- 18
- Pages
- 7796-7804
- ISSN
- 0897-4756 (ISSN-L)
- 1520-5002
- OpenAlex
- W3082196003
- Cited by
- 257
- References
- 40
- FWCI
- 11.98
- Type
- journal article
- Language
- en
- Open access
- green
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